Seeing too many console messages in 9.3.0

[Paul Hoffman]

Greetings. I'm kinda shocked that this isn't in the FAQ, and 
unfortunately the archives are not searchable right now (MARC dies 
with an error). Soooooo...

In switching from BIND 9.2.x to 9.3, I now see a zillion messages on 
the console and in /var/log/messages that say:

Nov 23 15:07:43 ns named[1777]: update-security: error: client 
148.235.74.53#20612: update 'proper.com/IN' denied

I am using the exact same named.conf I was using in 9.2.x. The 
relevant part is:

options {
     directory "/etc/namedb";
         notify yes;
         pid-file        "/var/run/named/pid";
         dump-file       "/var/dump/named_dump.db";
         statistics-file "/var/stats/named.stats";
};

logging {
         channel my_syslog {
                 syslog daemon; severity warning;
                 print-category yes; print-severity yes;
         };
         category general {my_syslog;};
         category default {my_syslog;};
         category notify {my_syslog;};
         category xfer-in {my_syslog;};
         category xfer-out {my_syslog;};
         category lame-servers {null;};
         category update {null;};
         category security {null;};
};

What magic do I need to get the silly warnings off the console and 
out of syslog????? I still want normal errors (like me fat-fingering 
something in the db.foo files) to appear in syslog.

Also, what changed between 9.2.x and 9.3.0 to make them appear?